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内蒙古河套引黄灌区现有农林牧灌溉面积722万亩,其中农田灌溉面积616万亩,是我国现有的特大型灌区之一.灌区地势平坦,土地肥沃,水资源丰富,具有发展农林牧业得天独厚的优势条件.但是由于长期大水漫灌,有灌无排,致使土壤盐碱化日益严重。近年来,在总结经验的基础上,确定了灌区排灌工程配套和技术改造的总方针是:合理灌溉,保证排水,防治土壤盐碱化,做到节水、节能、增产、增收。在实施这一方针的过程中,目前灌区内已开挖各级排水沟道长度达10400公里,据几年来的运用情况,在625公里长度的总干沟和干沟中塌坡段长度为266公里,占总长的41%,形成排
The Inner Mongolia Hetao irrigation area of the Yellow River has 722 mu of agriculture, forestry, animal husbandry and irrigated area, of which 616 mu of farmland irrigated area is one of the existing large-scale irrigated areas in China. The irrigated area is flat, fertile land and rich in water resources. Unique advantages of the conditions, but because of long-term flood irrigation, irrigation no row, resulting in the increasingly serious soil salinization. In recent years, on the basis of summing up experiences, the general guidelines of supporting and technological transformation of irrigation and drainage projects have been established: to rationally irrigate, ensure drainage, prevent and control soil salinization, achieve water saving, energy conservation, increase production and increase income. In the process of implementing this guideline, at present, drainage channels at all levels have been excavated in the irrigated area for a length of 10,400 kilometers. According to the application in recent years, the length of the slope of the main and the ditch in the 625-kilometer length is 266 Km, accounting for 41% of the total length, forming a row